Mr. O’Rourke, an El Paso native, has since reached out on Twitter to share his support for both Mr. Buttigieg and his husband.

“Texans don’t stand for this kind of homophobia and hatred. Mayor Pete, we are grateful you came to Texas and hope to see you and Chasten back again soon,” Mr. O’Rourke tweeted.

The founder of the Operation Rescue anti-abortion group, Mr. Terry previously led protests held last month at campaign events held by Mr. Buttigieg in Iowa.

“He’s the poster-boy for the homosexual movement,” Mr. Terry said in an interview on the Rick Roberts radio Show prior to disrupting Mr. Buttigieg’s speech. “He as a 37-year-old vet, speaks multiple languages, he’s the mayor of South Bend, he’s handsome, he embodies what they have been looking for. Which is to say, hey, homosexual behavior is normal.”

“Homosexual marriage is a joke. It’s an evil. It’s a non-starter. It’s a fallacy. There is no such thing,” he continued, adding that Mr. Buttigieg’s support of same-sex marriage makes him the “most dangerous man in America for children.”

Mr. Buttigieg and Mr. O’Rourke are among more than 20 candidates currently seeking the Democratic nominating to run in 2020 against President Trump. Recent polling has placed former Vice President Joe Biden as an early favorite among Democrats a year-and-a-half until Election Day.